Sprocket-wheel.



P. L. CROWE & A. FRANKENHEIM.

SPROCKET WHEEL.

APPLICATION FILED Nov.2|. 1914.

Patented Sept. 17. 1918.

I V/TNESSES W1TEDSTA'1ES PATENT- onn on.

PAUL L. cnown, or Jnnsnvfcirr, NEW JERSEY, AND nnnon FRANKENHEIM, or NEWYORK, N. .Y. a 1

SPROCKET-WHEEL.

Specification of Letters Patent. Patenteds'ept. 17, 1918.

Application filed November 21, 11914. :Serial No. 873,273.

To all whom it'may concern Be it known that we, PAUL L. Cnown and AARONFRANKENHEIM, citizens of theUnited States, residing at Jersey City, inthe county of Hudson and State of New Jersey, and in the borough ofBronx, in the county of Bronx and State of New York, respectively, haveinvented certain new and useful Improvements in Sprocket-Wheels, ofwhich the following is a specification.

Our invention consists of an improvement in sprocket wheels for use inconnection with mechanical stokers of the chain grate type. The objectof the invention is to provide a sprocket wheel which is speciallyadapted to receive and transmit driving power through the chain, theparticular feature of the invention herein involved relating to meanswhereby the connecting device between the chain and the grate bar may beaccommodated upon the sprocket wheel, and providing for access theretowhile on the wheel.

In the accompanying drawings illustrating preferred constructions of theinvention Fi ure 1 is a cross sectional view of a sproc et wheel takenon the line a, b, of Fig.

7, looking toward the left.

Fig. 2 is a similar sectional view showing the carrying chain inposition.

Fig. 3 is a face View in elevation of the sprocket wheel from the outerend.

Fig. 4 is a cross sectional View similar to Fig. 1 but in the oppositedirection.

Fig. 5 is a view of the sprocket wheel in elevation from the inner side.

Fig. 6 is an edge view of the sprocket wheel showing the chain inposition thereon.

Fig. 7 is a similar view with the chain removed.

Fig. 8 is a detail diagrammatic View showing the relative position ofthe grate bar and sprocket wheel, broken away.

The sprocket wheel of the present invention is so constructed as toprovide for driving engagement with the carrying chain of the gratebars, of well-known construction, and is adapted to provide for thepassage of the chain thereover and at the same time to facilitate theplacement and displacement gf the means securing the chain to the grateThe sprocket wheel as illustrated, provides for engagement with verticallinks and hubpontion -1 integral with the wheel member having at itsouter portion the series of sprocket projections 52, :the outer .end of:the shell ihub having an annular bearing shoulder 3. The inner portionsof the projections 2 are provided with inner projections 4: adapted tointerfit and engage with the chain links 5 and is also provided with aseries of depressions 6, alternating between projections 4., adapted tofacilitate engagement with the chain links.

Depressions 6 extend respectively across the bearing face of thesprocket and merge into the opposite alternating sprockets 7 arrangedintermediate of sprockets 4, and assist in positioning the links andprovide additional engagement therefor. Innermost depressions 8 arearranged across the bearing face of the sprocket between projections 4and extend into and through the base portions of opposite projections 7,opening at the opposite inner side thereof as indicated at 8. The objectof this construction is to provide clearance and a seating channel foreach of the pins which connect the grate bar with the chain. The objectin thus extending the depression 8 through to the other side of theprojection 7 is that any suitable device can be inserted for removal ofthe pin while the chain and grate bars are in position on the sprocket.Each sprocket wheel is provided with a depression 11 extendinglengthwise of the chain, in its direction when in place, between andtransversely of each pair of cross depressions 8, for clearance of theinner side of each vertical link 10. v

The opening 12 of each sprocket is provided at one side with the usualkey way 13 and by key 1 1 the sprocket is mounted on shaft 15, a setscrew also being preferably employed to bind the members in position.Key way 13 is preferably located midway between the projections atopposite sides and ends of the sprocket so as to distribute the strainand provide for the spacing of a sprocket wheel on either end of theshaft. By this means one sprocket wheel can be located on the same shaftin proper relation to the other sprocket wheel whereby to off-- set thesprockets.

As shown in Fig. 8 the inner face of each outer sprocket projection iscut away as indicated at 18 for clearance of the terminal grate bar hook19 and permitting it to freely pass over the sprocket wheel Withoutinterference.

What We claim is:

1. A sprocket Wheel for continuous chain I grates having a series ofinner and outer sprocket pro ectlons at each side of an annular chalnrece1v1ng portlon, said portlon having a series of transverse groovesterminating in openings extending through the bases of the innerprojections.

2. A sprocket Wheel for continuous chain grates having a series ofsprocket projections at each end, an intervening receding concaved chainbearing portion, and transverse clearance grooves therein formingcontinuations of openings which extend to the other side of one seriesof said sprocket pro jections.

Signed at New York city in the county of Bronx andState of New York this20th day of November A. D. 1914.

PAUL L. CROWE. AARON FRANKENHEIM.

WVitnesses:

LOUIS A. CRoWE, VGEORGE F. BENTLEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

